摘要
Abstract
The numerical control technology is widely applied to the machinery manufacturing, medical equipment, information, military equipment and other industries, and the core problem of the numerical control technology is to improve the motor speed and the rotor position control accuracy. To further improve the motor speed and position accuracy, and the implementation of digital systems, an improved speed and position calculation method of the permanent magnet synchronous motor was given. Based on the above method, a strategy to run the motor at low speeds with good speed and location response was given. To solve the inaccurate problem of speed and location estimate of motor working at low speed, based on the application of permanent magnet synchronous motor with position sensoriess, PI regulator was introduced to the rotor field oriented vector control system. When the motor was running at low speed (speed was between 5 r/min and 20 r/min), the system automatically switched to the low speed mode, and the error of the torque current was samples by PI regulator to obtain the motor speed information. The simulation results show that after the introduction of PI regulator, the motor has an excellent running effect working either at low speed or at high speed.关键词
数控/永磁同步电机/无位置传感器/PI调节器Key words
NC/ permanent magnet synchronous motor/ position sensoriess/ PI regulator分类
信息技术与安全科学
